I’m not sure what your talking about, I don’t understand why it would be that difficult to add something to an insurance claim when it is justified.
The Xactimate removal for comp shingles include a dumpster for the shingles. The vents, drip edge etc… are not included, so technically a separate dumpster should be included for anything that is not a comp shingle.
If the drip edge, vents are screwed down, then R&R is more then justified instead of just replace because they need to be backed out. Otherwise if you remove them in the same manner as the shingles then the decking will get damaged. Also, the removal of the pipe flashing is a vertical movement vs the horizontal or side to side movement of the shingle removal. It maybe a related event in the respect that it is a roof tear off and replacement but that the similarities end. As AD said in his post. The starter, cap shingles have a different labor rate and therefore should be estimated as such.
I think all adjusters should work a season or two in the trades roofing, framing, electrical, plumbing and concrete before they are allowed to estimate a claim.